GB670411A - Improvements relating to the manufacture of glass envelopes for electric discharge devices - Google Patents
Improvements relating to the manufacture of glass envelopes for electric discharge devicesInfo
- Publication number
- GB670411A GB670411A GB1853946A GB1853946A GB670411A GB 670411 A GB670411 A GB 670411A GB 1853946 A GB1853946 A GB 1853946A GB 1853946 A GB1853946 A GB 1853946A GB 670411 A GB670411 A GB 670411A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- envelope
- pinch
- expansion
- trade mark
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/06—Joining glass to glass by processes other than fusing
- C03C27/08—Joining glass to glass by processes other than fusing with the aid of intervening metal
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Joining Of Glass To Other Materials (AREA)
Abstract
670,411. Cathode-ray tubes. ELECTRIC & MUSICAL INDUSTRIES, Ltd. May 1, 1947 [June 20, 1946], No. 18539/46. Class 39 (i). The neck of a cathode-ray tube having one end of the neck formed of a tubular glass part of relatively low coefficient of expansion and the other formed of a tubular glass part of relatively high coefficient of expansion for sealing to the pinch is formed by interposing between these parts at least one ring shaped part of glass having an intermediate coefficient of expansion, and simultaneously fusing together the axially facing edges of the parts in a single fusing operation. In an example the leads for connection to the electrodes are made from a Fe/Ni/Co alloy such as " Kovar " (Registered Trade Mark) and sealed into a pinch of soft glass such as Chance's G.S.3, the envelope being of hard glass such as " Pyrex" " (Registered Trade Mark), and the pinch sealed to a tubular part of sealing glass such as G.S.3 with two intermediate glasses, namely B.T.H. C11 and " Intasil " (Registered Trade Mark), arranged between the sealing glass and the envelope. These borosilicate glasses have coefficients of expansion approximately as follows: Pyrex 33-35Î10<SP>-7</SP>, Intasil 36-40x10<SP>-7</SP>, C11 43-47x10<SP>-7</SP>, and G.S.3 47-49 x 10<SP>-7</SP>. The envelope is assembled on the headstock of a lathe, and a mandrel with the intermediate glass parts and the, sealing glass part, of corresponding diameter to the envelope neck, assembled in correct order is inserted in the tailstock. The mandrel, which may be fluted or relieved, may consist of hard carbon, heat-resisting steel, or "Meehanite" (Registered Trade Mark), and preferably does not rotate with the tailstock. The glass rings are now brought into contact with one another, and with the edge of the envelope neck and fused together, the flame being directed against Intasil and Pyrex, and the shape maintained by internal pressure and external tooling. The pinch may then be sealed to the sealing glass part. Specification 670,430 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1853946A GB670411A (en) | 1946-06-20 | 1946-06-20 | Improvements relating to the manufacture of glass envelopes for electric discharge devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1853946A GB670411A (en) | 1946-06-20 | 1946-06-20 | Improvements relating to the manufacture of glass envelopes for electric discharge devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB670411A true GB670411A (en) | 1952-04-16 |
Family
ID=10114153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1853946A Expired GB670411A (en) | 1946-06-20 | 1946-06-20 | Improvements relating to the manufacture of glass envelopes for electric discharge devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB670411A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2926459A (en) * | 1955-03-08 | 1960-03-01 | Owens Illinois Glass Co | Method of forming a hollow glass article |
| US4561874A (en) * | 1984-09-10 | 1985-12-31 | Rca Corporation | Method for heat sealing a gun mount in a CRT neck |
| US4589902A (en) * | 1985-08-30 | 1986-05-20 | Rca Corporation | Apparatus for sealing a mount in a cathode-ray tube |
| US4626269A (en) * | 1985-11-20 | 1986-12-02 | Rca Corporation | Automated system for sealing a mount in a cathode-ray tube |
-
1946
- 1946-06-20 GB GB1853946A patent/GB670411A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2926459A (en) * | 1955-03-08 | 1960-03-01 | Owens Illinois Glass Co | Method of forming a hollow glass article |
| US4561874A (en) * | 1984-09-10 | 1985-12-31 | Rca Corporation | Method for heat sealing a gun mount in a CRT neck |
| US4589902A (en) * | 1985-08-30 | 1986-05-20 | Rca Corporation | Apparatus for sealing a mount in a cathode-ray tube |
| US4626269A (en) * | 1985-11-20 | 1986-12-02 | Rca Corporation | Automated system for sealing a mount in a cathode-ray tube |
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